1964 CHEVROLET BEL AIR

Typical onset: 80,000-150,000 mi

Symptoms: excessive oil consumption (quart every 500-800 miles), blue smoke on startup or acceleration, low oil pressure at idle (under 10 psi hot), rod knock or main bearing rumble, blowby visible at oil filler cap

Fix: Most survivors need full engine rebuilds at this point — pistons, rings, bearings, crankshaft machining. You're looking at 25-35 hours for a complete teardown, machine work, and reassembly. Many owners opt for short block replacement or long block swap to save machine shop wait time. The inline-six is cheaper, small-block V8s (283/327) are moderate, big-blocks (348/409) get expensive fast on parts.

Estimated cost: $3,500-7,500

Typical onset: varies — age and heat degradation

Symptoms: clunk when shifting into drive or reverse, excessive driveline vibration at highway speed, transmission tail housing visibly sagging, shifter linkage binding or misaligned

Fix: Rubber deteriorates badly after decades, especially on Powerglide and 2-speed automatics. Mount replacement is straightforward — support the transmission, unbolt old mount, install new. About 1.5-2.5 hours depending on access and whether the crossmember bolts are seized. Always inspect the crossmember itself for rust-through while you're there.

Estimated cost: $200-400

Symptoms: hard starting when hot, stalling after 20-30 minutes of driving, sputtering or hesitation under load, rust particles in fuel filter, fuel starvation on inclines

Fix: Original steel tanks rust from inside out, and the mechanical fuel pumps mounted on the block get heat-soaked easily. Typical fix involves dropping and boiling out or replacing the tank (3-4 hours), new fuel pump (1 hour), inline filter, and sometimes new metal fuel lines if pitted. Heat shields or pump relocation help with vapor lock on V8s. Budget for tank replacement if original.

Estimated cost: $500-1,200

Typical onset: 60,000-100,000 mi or after extended highway use

Symptoms: burnt ATF smell, slipping on 1-2 shift when hot, delayed engagement after sitting, dark or varnished fluid, no external cooler present

Fix: The 2-speed Powerglide runs hot by design, especially in warm climates or with V8s. Most didn't come with auxiliary coolers. Adding an external transmission oil cooler (2-3 hours install) and flushing old fluid extends life dramatically. If already damaged, you're rebuilding or replacing — 8-12 hours labor plus core.

Estimated cost: $300-800 (cooler install + flush), $1,800-2,800 (rebuild)

Symptoms: body sag at doors or rear quarter, cracks in body panels near mount points, visible rust perforation on frame rails behind front wheels or ahead of rear axle, steering wander or alignment issues that won't correct

Fix: This is a unibody car sitting on a full frame, but 60 years in salt states or humid climates rots both. Body mounts are replaceable (6-8 hours to do all of them), but frame rust requires welding in patches or full rail replacement. Inspect thoroughly before buying — frame work is 20+ hours and requires frame-on lift access.

Estimated cost: $400-900 (body mounts only), $2,500-6,000+ (frame repair)

Typical onset: every 8,000-12,000 mi

Symptoms: misfiring at idle or cruise, hard starting, loss of power above 3,000 rpm, burnt points visible on inspection

Fix: Points-and-condenser ignition requires regular maintenance that most owners neglect. Points pit and gap widens, timing drifts, condenser shorts. Replacement is 0.5-1 hour, retiming another 0.3. Many swap to electronic ignition (Pertronix or similar) for $150-250 in parts, eliminates the issue permanently.

Estimated cost: $80-150 (points service), $250-400 (electronic conversion)